$mainColor:#409eff;
$success:#67c23a;
$warning:#e6a23c;
$danger:#f56c6c;
$info:#909399;
@mixin br ($radius) {
  border-radius:$radius;
  -webkit-border-radius:$radius;
  -moz-border-radius:$radius;
}
@function rem($px,$unit:75) {
  @return $px/$unit#{rem}
}

